Bhagavad Gita As It Is

References to text BG 18.55
BG 18.55: One can understand Me as I am, as the Supreme Personality of Godhead, only by devotional service. And when one is in full consciousness of Me by such devotion, he can enter into the kingdom of God.

Text
“[The Supreme Personality of Godhead, Kṛṣṇa, said:] ‘My dear Uddhava, neither through aṣṭāṅga-yoga [the mystic yoga system to control the senses], nor through impersonal monism or an analytical study of the Absolute Truth, nor through study of the Vedas, nor through austerities, charity or acceptance of sannyāsa can one satisfy Me as much as by developing unalloyed devotional service unto Me.’ ”
The Pastimes of Lord Caitanya Mahaprabhu in His Youth
CC 1.17.76
Each and every family residing in the land of Vrajabhūmi contributed one cow. In this way, thousands of cows became the property of Gopāla.
Sri Madhavendra Puri's Devotional Service
CC 2.4.102
The disciples of the Bhaṭṭācārya said, “We derive knowledge of the Absolute Truth by logical hypothesis.”
The Liberation of Sarvabhauma Bhattacarya
CC 2.6.81
“Lord Kṛṣṇa has made a firm promise for all time. If one renders service unto Him, Kṛṣṇa correspondingly gives him an equal amount of success in devotional service to the Lord.
Talks Between Sri Caitanya Mahaprabhu and Ramananda Raya
CC 2.8.90
“The mellows of Lord Kṛṣṇa’s pastimes, which are full of bliss, attract the jñānī from the pleasure of Brahman realization and conquer him.
The Lord Travels to Vrindavana
CC 2.17.137
Śrī Caitanya Mahāprabhu replied, “The Vedas, Purāṇas and great learned sages are not always in agreement with one another. Consequently there are different religious principles.
The Lord Travels to Vrindavana
CC 2.17.184
“When one is situated in pure devotional service, he develops love of Godhead; therefore let me describe some of the symptoms of pure devotional service.
Lord Sri Caitanya Mahaprabhu Instructs Srila Rupa Gosvami
CC 2.19.166
“ ‘However, if you dig up a small quantity of dirt on the eastern side, your hands will immediately touch the pot of treasure.’
Lord Sri Caitanya Mahaprabhu Instructs Sanatana Gosvami in the Science of the Absolute Truth
CC 2.20.135
“The conclusion is that devotional service is the only means for approaching the Supreme Personality of Godhead. This system is therefore called abhidheya. This is the verdict of all revealed scriptures.
Lord Sri Caitanya Mahaprabhu Instructs Sanatana Gosvami in the Science of the Absolute Truth
CC 2.20.139